摘要
经调查，浙江省直播稻田杂草发生特点主要表现为：发生时间长，有两个萌发高峰——播后５～１０ｄ和１５～２５ｄ；杂草种类多——其中发生频度较高的有５科１０种杂草；发生量大，种群组合复杂——发生总量比移栽稻田多３～５倍；部分恶性杂草由旱地向稻田蔓延，危害严重。分析成因主要是直播稻播种量少，生育期包括秧田期和本田期，干湿交替时间长，各种条件有利杂草萌发为害。针对该发生特点，提出了“前除，水控，后补”
Through investigated the characteristics of weeds at the Rice Direct sow field in zhejiang were investigated. Its main show is that Occurred of weeds long time and has tow high weeds germinate prior after 5～10 d and 15～25 d;There are many varieties of weeds in the paddy. A great variety and large scal,5 subject 10 kinds weeds often ocurred.Some of them move the paddy from the dry field,total amount of weeds is more 3～5 times than the transplant field. The case is serious. As analyse cause of the occurrences is little rice seeds,In growing prior,It is consist of the paddy and the nursery field that long time replace to the wet field from the dry field, to create favourable conditions for the weeds.We posed the tactics of tackle a problem in a comprehensive way“chemical control of weeds before sow” “co ntrol water”“control weeds is directed agaist”
出处
《植保技术与推广》
1997年第1期26-27,共2页
Plant Protection Technology and Extension
关键词
水稻
杂草
综合治理
rice Direct sow weeds tackle a problem in a comprehensive way.
